#define _CRT_SECURE_NO_WARNINGS	1
#include"stack.h"
void STInit(ST* pst)
{
	assert(pst);
	pst->a = NULL;
	pst->top = 0;
	pst->capacity = 0;
}
void STDestory(ST* pst)
{
	assert(pst);
	free(pst->a);
	pst->a = NULL;
	pst->top = pst->capacity = 0;
}#define _CRT_SECURE_NO_WARNINGS	1